Faint pos last few days, AF due tomorrow,pinkish bleeding

Hey all. This is my first post and I’m worried :/

I’ve had super sore bewbs the past week and I’ve also had mild crampy/pulling/tightening feelings for the past week too. I’ve been burping more than normal for the past week and been feeling hot and sweaty 🥵 these symptoms are not the norm for me.

I’ve tested each morning since Mon with my FMU and have gotten really faint positives. Today I got a faint pos too.

AF due tomorrow and I’ve just noticed that I have pinky/red CM.

I’m looking for reassurance i think. Whether this is pre-AF or if it’s implantation 🥺